Breakwater
WordNet
noun
(1) A protective structure of stone or concrete; extends from shore into the water to prevent a beach from washing away
WiktionaryText
Noun
- a construction in or around a harbour designed to break the force of the sea and to provide shelter for vessels lying inside
- a low bulkhead across the forecastle deck of a ship which diverts water breaking over the bows into the scuppers
- On beaches: a wooden or concrete barrier, usually perpendicular to the shore, intended to prevent the movement of sand along a coast.